Carel PRK300D0E0, User Manual, Page: 24 / 104

24
ENG
pRack +0300025EN rel. 1.3 - 17.12.2015
3.3.4 Connecting 0 to 5 V ratiometric pressure probes
For information on the maximum number of probes that can be
connected see the table at the beginning of this paragraph. pRack pR300
can be connected to any other pressure probes available on the market
with 0 to 5 V ratiometric sensor. The inputs must be set for 0 to 5 V Signals
from the user terminal or using the default value installation procedure.
The connection diagram is shown below:
U1 U2 U3 GND +VDC
U4 GND U5 GND
J1 J24 J2 J3
G G0
+V
term
GND
+5
V
REF
Fig. 3.d
Hardware
Version Terminals Probe wire
colour Description
S, M, D, L +5 V ref black power supply
GND green power supply reference
U1...U10, S1, S3 white Signal
Tab. 3.e
3.3.5 Connecting 0 to10 V active probes
For information on the maximum number of probes that can be
connected see the table at the beginning of this paragraph. pRack pR300
can be connected to 0 to10 V sensors. The inputs must be set for 0 to10
V Signals from the user terminal or using the default value installation
procedure. The connection diagram is shown below:
out H
M
out T
+ (G)
U1 U2 U3 GND +VDC
U4 GND U5 GND
J1 J24 J2 J3
G G0
+V
term
GND
+5
V
REF
Fig. 3.e
Hardware Version Terminals Description
S, M, L, D +VDC power supply (any)
GND reference
U1...U10 Signal
Tab. 3.f
3.3.6 Connecting analogue inputs selected as ON/OFF
For information on the maximum number of probes that can be
connected see the table at the beginning of this paragraph. The pRack
pR300 allows some analogue inputs to be confi gured as voltage-free
digital inputs, not optically-isolated. The inputs must be pre-confi gured
as voltage-free digital inputs from the user terminal or using the default
value installation procedure.
U1 U2 U3 GND +VDC U4 GND U5 GND
J1 J24 J2 J3
G G0
+V
term
GND
+5
V
REF
Fig. 3.f
Hardware Version Terminals Digital input cable
S, M, D, L GND 1
U1...U10 2
Tab. 3.g
Important :
•
the maximum current available at the digital input is 5 mA (thus the
rating of the external contact must be at least 5 mA).
•
these inputs are not optically-isolated.
3.3.7 Remote connection of the analogue inputs
The Sizes of the cables for the remote connection of the analogue inputs
are shown in the following table:
Type of input Size [mm 2 ] for
length up to 50 m
Size [mm 2 ] for
length up to 100 m
NTC 0.5 1.0
PT1000 0.75 1.5
current 0.25 0.5
voltage 0.25 0.5
Tab. 3.h
If the product is installed in industrial enviroment (in compliance for
the EN 61000-6-2 standard) the length of the connections must be less
than 30m. In any case you should never exceed this length to have no
measurement errors.
3.4 Connecting the digital inputs
The pRack pR300 features digital inputs for connecting safety devices,
alarms, device status and remote switches. These inputs are all optically
isolated from the other terminals at 24 Vac, 24 Vdc and some at 230 Vac
for M, D, L models.
Note : separate the sensor Signal and digital input cables as much
as possible from the inductive load and power cables, to avoid possible
electromagnetic disturbance.
Important :
•
if the control voltage is drawn in parallel with a coil, fi t a dedicated RC
fi lter in parallel with the coil (the typical ratings are 100 Ω, 0.5 μF, 630 V).
•
If connecting the digital inputs to safety systems (alarms), remember
that: the presence of voltage across the contact must be the normal
operating condition, while no voltage must represent an alarm
situation. This will ensure that any interruption (or disconnection) of
the input will also be Signalled. Do not connect the neutral in place
of an open digital input. Always interrupt the phase. The 24 Vac/Vdc
digital inputs have a Resistance of around 5 kΩ.
All pRack digital inputs can be powered at 24 Vac and 24 Vdc, while for
models M, D, L only 230 Vac inouts are also available. To maintain the
optical isolation of the digital inputs, a separate power supply must
be used just for the digital inputs. The connection diagrams shown in
these fi gures, which while being the more common and the more
convenient, do not exclude the possibility of powering the digital inputs
independently from the power supply to the pRack pR300. In any case,
the inputs only have functional insulation from the rest of the controller.
24 Vac digital inputs
The following fi gure represents an example for connecting the 24 Vac
digital inputs on pRack models S, M, L.
G
G0
Fig. 3.g